Last-Mile Delivery: The Most Expensive Part of Your Supply Chain
Every supply chain ends the same way: a product has to get from somewhere to the person who ordered it. That final leg — from a distribution centre, a local depot, or a store back room to the customer's door — is called last-mile delivery. It is also, consistently, the most expensive and operationally complex part of the entire logistics chain.
The numbers are stark. Last-mile delivery accounts for between 40 and 53 per cent of total shipping costs, depending on the industry and delivery model, despite being only the final fraction of the total distance travelled. Understanding why it costs so much — and what can be done about it — is one of the most important questions in modern supply chain management.
Why Last-Mile Delivery Is So Costly
The economics of last-mile delivery are punishing because of density. A long-haul truck moving goods from a distribution centre to a regional depot is making one journey with thousands of units on board. A last-mile delivery vehicle is making dozens or hundreds of individual stops, often with single packages, at addresses spread across residential neighbourhoods with no predictable route efficiency.
Failed deliveries compound the problem. When a recipient is not home, the package either has to be redelivered — at full cost — or held at a depot for customer collection, creating customer service friction and additional handling cost. In some markets, failed delivery rates run as high as 20 per cent on first attempt. Time-window commitments — the “your delivery will arrive between 2pm and 4pm” promise — reduce failed deliveries but increase route complexity and reduce driver productivity.
Residential addresses add cost that commercial addresses do not. Apartment buildings require access codes and elevator time. Suburban sprawl increases inter-stop distances. Rural deliveries can be uneconomic at any price that customers will pay. Reverse logistics — returns — add a further layer of cost and complexity to an already thin-margin operation.
The Main Delivery Models
Carrier delivery (UPS, FedEx, Canada Post, DHL). The most common model for e-commerce. Carriers aggregate volume across many shippers to achieve route density. Cost-effective for standard parcels; less flexible for same-day or time-specific delivery.
Courier and gig-economy networks (DoorDash, Instacart, Uber Eats-style logistics). Enable rapid, on-demand delivery for perishables and high-urgency orders. Unit economics are higher, but speed and convenience justify the premium for certain categories.
Click-and-collect (BOPIS — buy online, pick up in store). Transfers the last-mile cost to the customer by using the store network as a collection point. Highly cost-effective for retailers with physical footprints; drives incremental in-store revenue on collection trips.
Parcel lockers and pickup points. Amazon Lockers, postal locker networks, and convenience-store pickup partnerships consolidate delivery at fixed access points. One delivery covers multiple customers; solves the failed-delivery problem entirely.
Crowd-sourced delivery. Platforms like Instacart or Shipt use independent contractors to make hyperlocal deliveries. Effective for grocery and pharmacy; variable quality and regulatory complexity are ongoing challenges.
How to Optimise Last-Mile Costs
Route optimisation software has matured significantly. Modern tools incorporate real-time traffic, delivery time windows, vehicle capacity constraints, and driver hours-of-service requirements to generate routes that minimise total distance and time. The savings from rigorous route optimisation — compared with manual or basic routing — typically run between 10 and 25 per cent of delivery cost.
Delivery density is the second lever. Grouping deliveries by geography — batching orders in the same neighbourhood into a single route, or offering delivery-day incentives to customers who accept a consolidated window — directly reduces the cost per stop. Retailers that have shifted from “any day, any time” promises to “choose your delivery day” models have seen material cost reductions without meaningful loss of customer satisfaction.
Reducing failed deliveries has an outsized impact. Better pre-delivery notifications with accurate time windows, easy online rescheduling, and default-to-neighbour or parcel locker options on checkout pages all reduce first-attempt failure rates. A one-percentage-point reduction in failed delivery rates typically saves two to four per cent of last-mile cost.
The Sustainability Dimension
Last-mile delivery is also a meaningful sustainability challenge. Urban delivery vehicles — predominantly diesel vans — contribute disproportionately to urban air quality problems and greenhouse gas emissions relative to the volume they move. The emissions per parcel for last-mile delivery are higher than any other logistics segment, precisely because of the low stop density and frequent starts and stops.
Electric cargo bikes, electric delivery vans, and consolidated delivery schemes are all gaining traction in urban markets. Several major cities in Europe have restricted diesel delivery vehicles in city centres, accelerating the transition. For supply chain managers, the sustainability case and the cost case increasingly converge: higher-density, better-routed delivery operations are both cheaper and less carbon-intensive than fragmented, low-density alternatives.
Last-mile delivery is not a problem that can be solved once. Customer expectations continue to rise, urban density changes, and new models — drones, autonomous vehicles, micro-fulfilment centres — are approaching commercial viability at different rates in different markets. The organisations that manage last-mile costs effectively are those that treat it as a strategic capability, not just an operational expense.
XNM Consulting helps organisations build resilient, cost-effective supply chains. Learn more on our Procurement, Sourcing and Contract Management page.